package com.lyt.reggie.controller;


import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.lyt.reggie.common.R;
import com.lyt.reggie.dto.DishDto;
import com.lyt.reggie.entity.Category;
import com.lyt.reggie.entity.Dish;
import com.lyt.reggie.entity.DishFlavor;
import com.lyt.reggie.service.CategoryService;
import com.lyt.reggie.service.DishFlavorService;
import com.lyt.reggie.service.DishService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;


import javax.servlet.http.HttpServletRequest;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

/**
 * Author:李雨涛
 * Date:2023-03-04-16:55
 * 描述：
 */
@RestController
@RequestMapping("/dish")
public class DishController {
    @Autowired
    private DishService dishService;
    @Autowired
    private DishFlavorService dishFlavorService;
    @Autowired
    private CategoryService categoryService;
    @Autowired
    private RedisTemplate redisTemplate;

    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto) {
        dishService.saveWithFlavor(dishDto);
        return R.success("新增菜品成功");

    }

    @GetMapping("/page")
    public R<Page> page(int page, int pageSize, String name) {
        Page<Dish> pageInfo = new Page<>(page, pageSize);
        //因为pageInfo对象中没有分类ID，所以创建一个dishDtoPage对象，他有分类ID
        Page<DishDto> dishDtoPage = new Page<>(page, pageSize);

        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.like(name != null, Dish::getName, name);
        queryWrapper.orderByDesc(Dish::getUpdateTime);
        dishService.page(pageInfo, queryWrapper);
        //将pageInfo里面的字段的值拷贝给dishDtoPage，除了records
        BeanUtils.copyProperties(pageInfo, dishDtoPage, "records");
        //将pageInfo中的records的值取出
        List<Dish> records = pageInfo.getRecords();
        //遍历records的值，将其复制给dishDto的records
        List<DishDto> list = records.stream().map((item) -> {
            DishDto dishDto = new DishDto();
            //将值拷贝给dishDto
            BeanUtils.copyProperties(item, dishDto);
            //取出分类id，并根据其找到分类名字，并把值给dishDto
            Long categoryId = item.getCategoryId();
            Category category = categoryService.getById(categoryId);
            if (category != null) {
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }

            return dishDto;
        }).collect(Collectors.toList());
        //将上述得到的值给dishDtoPage的records
        dishDtoPage.setRecords(list);

        return R.success(dishDtoPage);
    }

    //删除菜品
    @DeleteMapping
    public R<String> delete(@RequestParam String ids) {
        if (ids.indexOf(",") == -1) {
            dishService.removeById(ids);
        } else {

            String[] strId = ids.split(",");
            for (int i = 0; i < strId.length; i++) {
                ids = strId[i];
                dishService.removeById(ids);
            }
        }

        return R.success("菜品删除成功");
    }

    @GetMapping("{id}")
    public R<DishDto> get(@PathVariable Long id) {
        DishDto dishDto = dishService.getByIdFlavor(id);
        return R.success(dishDto);
    }

    @PutMapping
    public R<String> update(@RequestBody DishDto dishDto) {
        dishService.updateWithFlavor(dishDto);
        return R.success("修改菜品成功");
    }

   /* @GetMapping("/list")
    public R<List<Dish>> List(Dish dish) {

        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId() != null, Dish::getCategoryId, dish.getCategoryId());
        queryWrapper.eq(Dish::getStatus, 1);
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
        List<Dish> list = dishService.list(queryWrapper);
        return R.success(list);
    }*/

    @GetMapping("/list")
    public R<List<DishDto>> list(Dish dish) {
        List<DishDto> dishDtoList = null;
        //动态构造key,dish_1397844391040167938_1
        String key = "dish_" + dish.getCategoryId() + "_" + dish.getStatus();
        //先从redis中获取缓存数据
        dishDtoList = (List<DishDto>) redisTemplate.opsForValue().get(key);
        if (dishDtoList != null) {
            //如果存在，直接返回，无需查询数据库
            return R.success(dishDtoList);
        }
        //构造查询条件
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.eq(dish.getCategoryId() != null, Dish::getCategoryId, dish.getCategoryId());
        //添加条件，查询状态为1（起售状态）的菜品
        queryWrapper.eq(Dish::getStatus, 1);
        //添加排序条件
        queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
        List<Dish> list = dishService.list(queryWrapper);
        dishDtoList = list.stream().map((item) -> {
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item, dishDto);
            Long categoryId = item.getCategoryId();//分类id
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);
            if (category != null) {
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }
            //当前菜品的id
            Long dishId = item.getId();
            LambdaQueryWrapper<DishFlavor> lambdaQueryWrapper = new LambdaQueryWrapper<>();
            lambdaQueryWrapper.eq(DishFlavor::getDishId, dishId);
            //SQL:select * from dish_flavor where dish_id = ?
            List<DishFlavor> dishFlavorList = dishFlavorService.list(lambdaQueryWrapper);
            dishDto.setFlavors(dishFlavorList);
            return dishDto;
        }).collect(Collectors.toList());
        //如果不存在，需要查询数据库，将查询到的菜品数据缓存到Redis
        redisTemplate.opsForValue().set(key, dishDtoList, 60, TimeUnit.MINUTES);

        return R.success(dishDtoList);
    }


    //停售及批量停售.
    @PostMapping("{status}")
    public R<String> stop(int status,Long ids){

        return null;
    }

}
